Pencil sharpener



FIG. 1 is a front, right, and top perspective view of an ornamentaldesign for a pencil sharpener according to the present invention;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a back elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a front, right side perspective thereof, with the visor in thelifted position.

All portions shown in broken lines are environmental and illustrativeonly and form no part of the claimed design.

The ornamental design for a pencil sharpener, as shown and described.